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• W2000919224 abstract "Coronary artery stent lumen visibility was assessed as a function of cardiac movement and temporal resolution with an automated objective method using an anthropomorphic moving heart phantom. Nine different coronary stents filled with contrast fluid and surrounded by fat were scanned using 64-slice multi-detector computed tomography (MDCT) at 50-100 beats/min with the moving heart phantom. Image quality was assessed by measuring in-stent CT attenuation and by a dedicated tool in the longitudinal and axial plane. Images were scored by CT attenuation and lumen visibility and compared with theoretical scoring to analyse the effect of multi-segment reconstruction (MSR). An average increase in CT attenuation of 144 +/- 59 HU and average diminished lumen visibility of 29 +/- 12% was observed at higher heart rates in both planes. A negative correlation between image quality and heart rate was non-significant for the majority of measurements (P > 0.06). No improvement of image quality was observed in using MSR. In conclusion, in-stent CT attenuation increases and lumen visibility decreases at increasing heart rate. Results obtained with the automated tool show similar behaviour compared with attenuation measurements. Cardiac movement during data acquisition causes approximately twice as much blurring compared with the influence of temporal resolution on image quality." @default.
• W2000919224 created "2016-06-24" @default.
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• W2000919224 date "2007-02-16" @default.
• W2000919224 modified "2023-09-28" @default.
• W2000919224 title "A new approach to the assessment of lumen visibility of coronary artery stent at various heart rates using 64-slice MDCT" @default.
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• W2000919224 doi "https://doi.org/10.1007/s00330-006-0568-8" @default.
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